diff --git a/LXMF/LXMessage.py b/LXMF/LXMessage.py
index 5d00588..fcf47bc 100644
--- a/LXMF/LXMessage.py
+++ b/LXMF/LXMessage.py
@@ -95,7 +95,7 @@ class LXMessage:
     PLAIN_PACKET_MAX_CONTENT = PLAIN_PACKET_MDU - LXMF_OVERHEAD + DESTINATION_LENGTH
 
     # Descriptive strings regarding transport encryption
-    ENCRYPTION_DESCRIPTION_AES = "AES-128"
+    ENCRYPTION_DESCRIPTION_AES = "AES-256"
     ENCRYPTION_DESCRIPTION_EC  = "Curve25519"
     ENCRYPTION_DESCRIPTION_UNENCRYPTED = "Unencrypted"